Table 1.

The maximum load of the specimen in each group (N)

Specimen No.	Control group	Experimental group 1	Experimental group 2
1	640	592	679
2	448	472	419
3	552	592	557
4	448	635.2	694
5	608	627.2	771
6	704	551.2	654
7	480	456.8	598
8	432	404	684
9	512	596.3	801
10	456	667.2	605
11	480	522.5	552
12	—	—	727
Mean ± SD	559.3 ± 82.3	523.6 ± 86.5	645.1 ± 105.9